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symbol_is_pair() helper function introduced

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hroff-1902 2019-07-02 12:39:46 +03:00
parent f401b775d2
commit 783583092d
2 changed files with 15 additions and 2 deletions
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4
freqtrade/exchange/exchange.py
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@ -19,7 +19,7 @@ from pandas import DataFrame
from freqtrade import (DependencyException, InvalidOrderException,
OperationalException, TemporaryError, constants)
from freqtrade.data.converter import parse_ticker_dataframe
from freqtrade.misc import deep_merge_dicts
from freqtrade.misc import deep_merge_dicts, symbol_is_pair
logger = logging.getLogger(__name__)
@ -208,7 +208,7 @@ class Exchange(object):
if quote_currency:
markets = {k: v for k, v in markets.items() if v['quote'] == quote_currency}
if pairs_only:
markets = {k: v for k, v in markets.items() if '/' in v['symbol']}
markets = {k: v for k, v in markets.items() if symbol_is_pair(v['symbol'])}
if active_only:
markets = {k: v for k, v in markets.items() if v['active']}
return markets

13
freqtrade/misc.py
View File

@ -137,3 +137,16 @@ def deep_merge_dicts(source, destination):
def plural(num, singular: str, plural: str = None) -> str:
return singular if (num == 1 or num == -1) else plural or singular + 's'
def symbol_is_pair(symbol: str, base_currency: str = None, quote_currency: str = None):
"""
Check if the symbol is a pair, i.e. consists of the base currency and the quote currency
separated by '/' character. If base_currency and/or quote_currency is passed, it also checks
that the symbol contains appropriate base and/or quote currency part before and after
the separating character correspondingly.
"""
symbol_parts = symbol.split('/')
return (len(symbol_parts) == 2 and
(symbol_parts[0] == base_currency if base_currency else len(symbol_parts[0]) > 0) and
(symbol_parts[1] == quote_currency if quote_currency else len(symbol_parts[1]) > 0))